Brush lock



J. BONARDI BRUSH LOCK Filed June 24, 1931 Dec. 6, 1932.

N u WI r N N i m ATTOR NEY Patented Dec. 6, 1932 UNITED STATES JOSEPH BONARDI, OF ROCK FALLS, ILLINOIS BRUSH Loox Application filed June 24, i

This invention relates to brush or buffer locks and has for the primary object, the provision of a simple and efficient means for detachably securing a brush or buffer to the arbor of a iiexible shaft, wherein the rotation of the brush or buffer by the flexible shaft will aid in securing the brush and buffer to the arbor against accidental disconnection and which will permit easy and quick removal of the brush or buffer by rotating the latter in a reverse direction relative to the arbor, thus obviating the need or use of any type of tool to make the removal.

Another object of this invention is the provision of an improved bearing or journal between the arbor and handle of the brush which will reduce friction to a minimum.

A further object of this invention is the provision of a brush of the above stated character which will be simple, durable and efficient and which may be manufactured and sold at a comparatively low cost.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangebent of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a side elevation partly in section illustrating a brush lock constructed in accordance with my invention.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a fragmentary view partly in section illustrating the attaching medium and its means of attachment to the arbor.

Referring in detail to the dra-wing, the numeral 1 indicates a handle having a bore 2 one end of which is internally screw threaded to receive the screw threaded end of a shaft housing 3 in which is mounted a flexible shaft 4 of a conventional type. The bore 2 has a portion thereof enlarged to form a bearing or journal chamber 5 opening through one end of the handle and the last named end of the handle is enlarged to form a head 6 which is recessed as shown at 7 to receive a brush mounting -`maftei1 more fully described.

Vtion with a minimum amountof friction and Alarged as shown at 20 and provided with a 1931. sriai No. 546,571. Y

which will be here- A sleeve 8 is located in the chamber 5 and has its ends flared to frictionally engage the walls of the chamber 5 and to provide raceways for balls 9 that engage bearing portions y or cones 10 of an arbor 11. The arbor 11 eX- tends through the sleeve and is rotatably supported bythe balls so asto have free rotahas one end socketed to receive the end of the flexible shaft 4 so that the arbor will be rotated byV the rotation of the flexible shaft. The other end of the arbor 4 is reduced to form an extension 12 located concentrically of the head 6 and is screw threaded as shown at 13 and has threaded thereonan attaching medium 14. A washer 15 is mounted'on the t extension 12 against the attaching medium 14 and is held thereagainst by a nut 16 having 70 threaded engagement with the extension. The washer 1541s preferably of the splittor lock type to prevent the securing medium 14 from becomingV accidentally disconnected from the extension 12.

One of the cones 10 of the arbor is formed `integral therewith while the other cone is mounted upon the extension and removable therefrom as clearly shown in Figure 2.

Partially within the head 6 is a hand-hold 4S0 17, having a hub portion 18 which has a tapped connection with the extension 12 of the arbor, and rotateswith said arbor when the parts are fully assembled.y The walls of the part 17 are flared outwardly, and said Y part and the head of the handle can be grasped by one hand of the operator to hold the part 17 and arbor 11 from rotation.

A brush or buffer head 19 has one end encentrally located recess 21 to receive the end of the extension 12. An attaching plate 22 is detachably secured to the enlarged end of the brush or buffer head 19 and practically closes the recesses 21 and is provided with a `-95 screw threaded opening to receive screw threads 23 forming an integral part of the attaching medium 14.

The brush or buffer carrying the attaching plate 22 is adapted to be threaded onto the 100 attaching medium 14 in the same direction as the brush or buffer rotates by the iiexible shaft 4 or the arbor 11 so that during the use of the device the tendency is for the brush s or b-uifer to thread onto the attaching medium, consequently obviating any possibility of the brush or buffer becoming accidentally disconnected rfrom the arbor. To remove the brush or Vbuiier, the flexible shaft 4 is 10 held against rotation in the manner above described, and the brushaorbuferrotatedfin a reverse direction. To return the brush to l operative position this operation is reversed, With the brush turning in a clock-Wise direc- 15 tion. The hand-hold 17 Valso encloses the hub 2Q, Vvforming a-shield therefor, -and zpreventing objects romcoming in contact therev Awith or .getting caught thereon. p From the foregoing description taken in 20 connection Withthe accompanying drawing, it wil-lbe noted that a very eiiicient means is .provided ffor attaching -a brush or buffer Kto an arbor driven from a flexible shaft and that the -arbor is rotatably -supported within '-25 a Ahandle with a minimum amount of rictti-0D; f

While I have shownand described :thegpreferred embodiment of my invention, it lwill abe understood that minor changes in -conf 50 structiomcombination and arrangement of parts maybe ymade without `departing from the spirit and scope of my invention, as claimed. o

Having thus described my invention, what Y .35 llfclaim is: Y

l. A'brushr lock comprising ..a cylindrical f. handle .provided -With a head at one of Vits ends, an xarbor rotatably mounted in l said `handlefa hand-hold connected 'with said ar- H40 bor and forming an extension of said ihead,

Lsaid head and hand-hold beingrjointly aen- ;gageable by the hand 'of the'operator to hold the hand-hold and arbor yfrom rotation, and a brush assembly detachably `connected vwith V565 Lsitid arbor to rotate therewith.

f2. A brush 4lock comprising a-cylindrical handle :provided at one of its ends with a head, an yarbor rotatably mounted in said handle, a hollow hand-hold connected with 50 lthe arbor Aand :forming an extension Lof said handle, anda cylindrical brushassembly'con- :nected with said arbor, and havinga partienclosed Within said hand-hold and shielded thereby. v i y in testimony whereof I aix my signature.

` JGSEPH BONARDL 

